Passive Microwave Vector Summing Line for Wideband Signal Addition
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Solution Overview
Problem
Existing analog and digital signal summing methods at microwave frequencies are complex or expensive, and there is a need for a simpler and more cost-effective solution.
Innovation Solution
An analog vector summing device using a passive microwave line with a coupling line to perform vector summation of electrical signals, avoiding active components and capacitive loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If operational amplifiers and non-linear components are used for analog summing, then signal summation can be achieved, but device complexity and cost increase
Solution Approach 1:
The patent replaces electronic active components (operational amplifiers, non-linear components) with a passive mechanical/physical system - a transmission line with specific electrical length. The signal summation function is achieved through electromagnetic wave propagation and interference on the transmission line, eliminating the need for complex active electronic circuits.
Solution Approach 2:
The invention extracts the essential summing function from complex active circuits and implements it using only passive transmission line elements. By removing active components and using only passive electromagnetic propagation, the device achieves summing with reduced complexity while maintaining the core functionality.
2Ease of manufacture
If digital signal processing is used, then signal summation can be achieved, but conversion complexity and cost increase
Solution Approach 1:
The patent replaces digital signal processing (which requires ADC, digital processing, and DAC circuits) with a direct analog electromagnetic process on a transmission line. The vector summation is performed naturally by the electromagnetic waves on the line, eliminating the need for complex digital conversion circuits.
3Power
If active components are used in microwave summing circuits, then signal amplification and processing can be achieved, but power consumption increases
Solution Approach 1:
The transmission line performs signal summation passively using the energy already present in the input signals. The electromagnetic waves on the line naturally interfere and sum vectorially without requiring external power sources or active components, making the system self-sufficient and energy-efficient.
Solution Approach 2:
The patent replaces active electronic components that consume power with a passive transmission line that uses the signal energy itself to perform the summation operation, thereby eliminating additional power consumption.
4Ease of manufacture
If conventional summing circuits are used at microwave frequencies, then signal summation can be achieved, but component cost increases
Solution Approach 1:
The patent uses a simple transmission line structure that can be implemented with basic microwave PCB techniques or coaxial cables, replacing expensive specialized microwave components. The transmission line is a fundamental, inexpensive element that can be easily fabricated using standard manufacturing processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient signal summation with large bandwidth, reduced power consumption, ease of fabrication, and mechanical robustness without requiring active components.
Implementation Method 1
the microwave line (110) has a length that provides a standing wave for respective signals at the input ends
Implementation Method 2
an output line that comprises a coupling line that is electromagnetically coupled to the microwave line across a gap
Data Source
AI summary
An analog vector summing device including a microwave line that has a first end and a second end that are electrically part of the microwave line; an output line that comprises a coupling line that is electromagnetically coupled to the microwave line across a gap, wherein the output line further comprises an output end which is electrically part of the output line, to provide a signal which represents the vector sum of the respective signals at the input ends.